Model: Curran - Crusher Rim Inner Diameter: 28.93mm Throat Diameter: 8.08mm Cup Depth: Very Deep George Curran's signature model. While retaining playability in the mid-high range, the very deep cup makes it suitable for playing in the extremely low range and in large ensembles. There are scratches due to normal use, but there is no problem with playing. The cup is very deep, and at first glance, it may seem difficult to play, but it has a very rich sound, and it is a mouthpiece that produces a very beautiful sound from solo to large ensemble. I am selling it because I bought a new mouthpiece.